A large chain of building supply yards was aiming to grow at a rate of three new yards per year. From past experience, this meant carefully reviewing as many as 20 or 30 possible locations. You have been assigned the task of making this process more systematic. The first step is to specify the types of secondary information that should be available for the market area of each location. The second step is to identify the possible sources of this information and appraise their usefulness. From studies of the patrons of the present yards, you know that 60 percent of the dollar volume is accounted for by building contractors and tradesmen. The rest of the volume is sold to farmers, householders, and hobbyists. However, the sales to do-it-yourselfers have been noticeably increasing. About 75 percent of the sales were lumber and building materials, although appliances, garden supplies, and home entertainment systems are expected to grow in importance.